<template>
	<view v-if="goods_info.goods_name" class="goods-detail-container">
		<!-- 轮播图区域 -->
		<swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" circular="true">
			<swiper-item v-for="(item,i) in goods_info.pics" :key="i">
				<image :src="item.pics_big" @click="preview(i)" ></image>
			</swiper-item>
		</swiper>
		
		<!-- 商品信息区域 -->
		<view class="goods-info-box">
			<!-- 商品价格 -->
			<view class="price">￥{{goods_info.goods_price}}</view>
			<!-- 商品信息主体 -->
			<view class="goods-info-body">
				
				<!-- 商品名字 -->
				<view class="goods-name">{{goods_info.goods_name}}</view>
				
				<!-- 收藏 -->
				<view class="favi">
					<uni-icons type="star" size="18" color="gray"></uni-icons>
					<text>收藏</text>
				</view>
				
			</view>
			
			<!-- 运费 -->
			<view class="yf">快递：免运费</view>
		</view>
		
		<rich-text :nodes="goods_info.goods_introduce"></rich-text>
		
		<!-- 商品导航 -->
		<view class="goods_nav">
			<!-- fill 控制右侧按钮的样式 -->
			<!-- options 左侧按钮的配置项 -->
			<!-- buttonGroup 右侧按钮的配置项 -->
			<!-- click 左侧按钮的点击事件处理函数 -->
			<!-- buttonClick 右侧按钮的点击事件处理函数 -->
			<uni-goods-nav :fill="true" 
				:options="options" :buttonGroup="buttonGroup" 
				@click="onclick" @buttonClick="buttonClick">
			</uni-goods-nav>
		</view>
	</view>
</template>

<script>
	// 从vuex 中按需导出 mapState 辅助方法
	import { mapState, mapMutations, mapGetters } from 'vuex'
	export default {
		data() {
			return {
				//商品详情对象
				goods_info: {},
				//商品导航配置
				options : [
					// {icon: 'headphones',text: '客服'},
					{icon: 'shop',text: '店铺',infoBackgroundColor: '#007aff'},
					{icon: 'cart',text: '购物车',info: 0}
				],
				buttonGroup: [
					{
						text: '加入购物车',
						backgroundColor: '#ff0000',
						color: '#fff'
					},
					{
						text: '立即购买',
						backgroundColor: '#ffa200',
						color: '#fff'
					}
				],
			};
		},
		onLoad(options) {
			console.log(options)
			//得到商品 Id
			const goods_id = options.goods_id;
			//调用请求商品详情数据的方法
			this.getGoodsDetail(goods_id);
		},
		computed: {
			...mapState('m_cart',['cart']),
			...mapGetters('m_cart',['total'])
		},
		watch: {
			total: {
				handler(newVal) {
					const findResult = this.options.find(x => x.text === '购物车');
					
					if ( findResult ) {
						findResult.info = newVal
					}
				},
				immediate: true
			}
		},
		methods: {
			...mapMutations('m_cart',['addToCart']),
			async getGoodsDetail(goods_id) {
				const {data:res} = await uni.$http.get('/api/public/v1/goods/detail',{goods_id});
				if(res?.meta?.status !== 200) return uni.$showMsg();
				
				//使用字符串的replace()方法，为img标签添加行内的样式，从而解决图片底部留白问题
				res.message.goods_introduce.replace(/<img /g,'<img style="display:block;" ')
				.replace(/webp/g,'jpg')
				// console.log((res.message.goods_introduce))
				this.goods_info = res.message;
				
			},
			//预览图片
			preview(i) {
				//调用 uni.previewImage() 方法预览图片
				uni.previewImage({
					//预览时，默认显示指定索引的图片
					current: i,
					//所有图片 url 地址的数组
					urls:this.goods_info.pics.map(x => x.pics_big)
				})
			},
			onclick(e) {
				uni.$showMsg(`点击 ${e.content.text}`)
				if(e.content.text === '购物车') {
					uni.switchTab({
						url:'/pages/cart/cart'
					})
				}
			},
			buttonClick(e) {
				console.log(e)
				if(e.content.text === '加入购物车') {
					const goods = {
						goods_id: this.goods_info.goods_id,
						goods_name: this.goods_info.goods_name,
						goods_price: this.goods_info.goods_price,
						goods_count: 1,
						goods_small_logo: this.goods_info.goods_small_logo,
						goods_state: true
					}
					
					this.addToCart(goods)
					console.log(this.cart)
				}
			}
		}
	}
</script>

<style lang="scss">
	.goods-detail-container {
		padding-bottom: 50px;
	}
	
	swiper {
		height: 750rpx;
		
		image {
			width: 100%;
			height: 100%;
		}
	}
	
	.goods-info-box {
		padding: 10px;
		padding-right: 0;
		
		.price {
			color: #C00000;
			font-size: 18px;
			margin: 10px 0;
		}
		
		.goods-info-body {
			display: flex;
			justify-content: space-between;
			
			.goods-name {
				font-size: 13px;
				margin-right: 10px;
			}
			
			.favi {
				width: 120px;
				font-size: 12px;
				display: flex;
				flex-direction: column;
				align-items: center;
				justify-content: center;
				border-left: 1px solid #efefef;
				color: gray;
			}
		}
	}
	
	.yf {
		font-size: 12px;
		color: gray;
		margin: 10px 0;
	}
	
	.goods_nav {
		position: fixed;
		bottom: 0;
		left: 0;
		width: 100%;
	}
</style>
